Locking devige



C. F. DOTTS. LOCKING DEVICE. APPLICATION FILED MAR 51 1921.

E ETS-SHEET 1.

Pdtented Feb. 21, 1922.

ATTORNEY C. F. DOTTS.

LOCKING DEVICE.

APPLICATION FILED MAR- 5, 1-921.

Patented Feb. 21, 1922.

2 SHEETS-SHEET 2.

INVENTOII.

ATTORNEY anneal) szraras cmus'r: F. norms, or

To all whom it maycoincern:

Beitknownthatfl, CHnIsrEjDoTTs, a

citizen of the United States, residingatMillvale, in the county of, Allegheny and State of Pennsylvania, have invented new and useful. Improvements in Locking Devices, i

1 which the following is a specification.

This invention relates to locking devices,

and more particularlyitoa locking device specially adapted for use in connection, with wire line clamps suchzas used in well drilling operations. a p j I j I i One of the main objects of the invention is to provijde a'locking device ofsimple construction and operation which maybe readily applied. A further object isto .pro-

=videa lock-ing device which will permitready manipulation of the clamp and will do away "with the necessity of moving the .T-screw with :the left memberof the clamp when openedand closed. Further objects willap- 7 pear from the detaileddescription.

i=posite. side to-Figurefi. --Eigure4;is; av detail front view of the.-lock Inthe drawings: a 1 Figurel is-a top planview of the lock ng device, as; applied.

Figure "2': isa side View; the T screwpbeing :sectionech taken. substantially on line 2-2 i of Figure 1. e

nl igure-iis a side View taken from the op- Figure '5 is akdetail ofthe clevis. y

.The locking: device is intended to be; used *in'connection with a wire line clamp suchjias -that gdIlSClOSGd inmy- U. S. application-#379, [619: filed May 7 1920. The clamp comprises two segmental gripping members ior ljaws 1 andf2. ,Jaw 2 is-providedwadjacent to its upper end with an arcuate arm 3 w hich en- .circles the upper .portionof jaw 1, and jaw --2 is: providednat its lower end with asimilar arm 4 which encircles, the lower portion of upper. endwvith la hea vy hook S'adapted to 6-for gripping a cable. Jaw 1 is provided I Portion *of the jawito form stop elements fiti noexme EDEVIGE.

Specification of Letters Patent.

rarrnm. nor- Richy MILLVALE, rnmvsynvmrra, -Assreivoa.or-,'onn=rmnn rd DA ID mooimyorrItrrsBnRGrmPENNsYLvANIa I .Patentefd Feh 21 1922.

iApplication-fi1ed:-Marchi5, 1921. :Serial K004503008,

ting between arms?) and): so as, to positively preventirelative vertical movement between the/jaws when assembled. A similan'arm fi proj ects -,i:'rom jaw.2 ,and is .provided atits upper .ian'dflower edges with "reinforcing flanges 1 0 which converge into'f jaw 12. ,IThis provides a clamp of simple and nefiicient constructioni in which great pressure may be ex- 7 erted for A- gripping the wire line, and; the gripping jaws are; positively secured against relative :vertical movement. r V

clip :11" is securedcon the outer face "of arm 7 which is. generall termed the left armot the clamp. Thisclip engagescabouta bightportion l2 ofa Ueshaped clevis l2 which stracldes .arm a 7 j v, and a is provided ;,at

the ,center of bight vportion 12 with'jan ng i' isp sedj itsip n e en -0r handle 14 which projects through aslot 11 in clipill. IA .U -bracketzl5jis securedon-the outer-face of-arm 9 and slidably receives a nut 16 through which, is threaded theshank 17101: a T,-screw 18; the inner end 9ft this screw beingfseated at 19in ,a recessfin arm v .-9., :The screw is securediagainst outward movement through :the bracket-by a collar .20 a

H which is threaded-uponshank '17,;a-ndibears 7 against the inner face of bight 21iof bracket 15, this collar being secnredagainst turning nponrthescrew 'by-aacotter pin22 inserted 1' through :thecollar and the ,shankiof the iscrew, or in anypther suitable ;or preferred manner. Nut 1 16 .pro-jectsr ebo eand: below bracket 15 and isrprovided in its forward 1 T face with two .--transversely extending r-coves :23 whichare Ladaptedto receive. the -end portions of arms 12 of clevis 12; "Each of these arms is provided at its outeror free end with a-vk nob '12 c0n-nectedto therarni by, atapered or beveled element 12 which is .c adapted: tot-fit intoa corresponding recess {or unseat .-23,pr0videdx-at the outer, end of ;gro0ve, 23.

, In apply ng t l m-p id e obyi m r-io ing T screw, l8 -and handle 14: thetwo arms '7 (and 9-may ,beimoved toward. each other so as to close the clamp upon: the line; When the: clamp is closed; upon the line, the: operaj'ter swings the clevis by means of handle al i i into substantiallyithe position illustrated in .Figure 1 causing the arms of the clevis to engage into tl1e,g1;ooves;in the nut, this operationbeing practically automatic, and

resulting from' stoppageoi movement of ltl ie It may-be found desi armstoward each other when the jaws of the clamp grip the line. After the clamp has been closed the T screw is turned so as to force nut 16 outwardly in bracket 15. thus exerting great pressure upon the cable or line so as to effectively grip the same. This efiectively locks the clamp, closed, and all possibility of accidental opening of the clamp is eliminated by seating of knobs 12 in the recesses or seats 23 at the outer ends of grooves 23 of nut 16. By providing these recesses and "the'knobs at the ends of the arms of the clevis I permit a slight rocking movement" of the knobs so" as to insure proper aligning of the clevis thus obtaining adjusts the locking device, .such as is the common practice in locking devices for wire hne clamps at present in use.

rable in practice to resort to changes in construction and arrangement of the details ofthe invention without departing from the field and scope of the same, and I intend to include all such variations, as fall within the scope of the appended claims, in this application in which the preferred form only of my invention is disclosed. V

WhatI claim is i 1. In combination with a clamp including arms movable toward and away from each other, a locking member mounted upon one of said arms, alocking member mountedon 45 the other arm, means for detachably securing said locking members together, and

means for forcing one of the locking members away 'from the arm on which it is mounted.

2iv In combination with a wire line clamp including clamping members and arms projecting from said members, a locking member mounted upon one of said arms, a locking member mounted on the other arm, means for detachably securing said locking members together, and means for forcing one of the locking members in a direction to close the clamping members;

3. In combination with a wire line clamp including clamping members and arms projecting from said members, a locking member mounted on one of said arms, a locking member mounted on the other, arm and movable into and out of engagement'with the first mentioned locking member, means for securing saidlocking members together, and means for forcing one of said members in a direction to close said clamping members.

4. In'combination with a clamp including oppositely movable arms, a locking member mounted on one of the arms, means for adjusting said locking member toward and away from said arm, a locking member mounted on the other arm and movable into and out of engagement with the first mentioned locking member, and means for securing said locking members together.

5. In combination with a clampincluding oppositely movable arms, a locking member carried by one ofsaid arms and adjustable 7 toward and away from the same, means for adjusting said member, and a locking member mounted on the other arm andmovable into and out of engagement with the first mentioned member, said members being provided with co-operating means for preventing separation of the locking members when the first mentioned member is adjusted in one direction. 1

6. In combination with a clamp including oppositely movable arms, a locking member carried by one of said arms and adjustable toward and away from the same, a locking member rockably mounted on the other arm so as to be turned into or out-of engagement with the first mentioned locking member,

said first mentioned member being adapted for reception of the second mentioned member, and means for preventing movement of said'second mentioned member through the first mentioned member when the latteris adjusted in a directionto close the clamp.

7. In combination with a wire line clamp 1 including clamping members and arms projectin g from the same, a clevis mounted upon and straddling one of said arms, and

a member mounted upon the otherarm and adjustable toward and away from the same, said member being adapted to receivethe ends of the arms of the clevis, and the member'and the clevis arms being provided'with (to-operating means for preventing longitudinal movement of the'arms of the clevis through said member in the direction of the arm on which the clevis is mounted.

8. In combination with a wire line clamp including clamping members and arms projecting from the same, a clevis mounted at its bight portion'on one "of said arms and straddling the same, a nut mounted on the other arm and provided with grooves adapted for reception of the end portions of the clevis, and means for adjustingsaid nut toward and away from said other arm, the

nut and the arms of the clevi's being provided with co-operating means for preventing movement 'ofthe clevis arms through the nut toward the arm onwhich the clevis is mounted. I I

9. In combination with a wire line clamp including clamping members and arms pro jecting from the same, a clevis mounted at its bight portion on one of said arms and straddling the same, a nut mounted on the other arm and provided with grooves adapted for reception of the end portions of the. clevis, and means for adjusting said nuttoward and away from said other arm, the nut and the arms of the clevis being provided with co-operating means for preventing movement of the clevis arms through the nut toward the arm on which .the clevis is mounted while permitting rocking movement of the arms of the clevis in said nut.

10. In combination with a wire lineclamp including clamping members and'arms proreception of the end portions of the arms. of said clevis.

11. In combination with a wire line clamp including clamping elements and arms projecting from the same, a substantially U shaped clevis rockably mounted at its bight portion on one of said arms and straddling the same, abracket secured on the other arm,

a nut slidably mounted in said bracket for movement toward and away from said other 7 arm and projecting above and below the bracket, said nut being provided in its forward face with transversely extending grooves adapted for reception of the end portions of the arms of the clevis, the clevis being provided at the outer endof each of its arms with enlarged elements, and means for adjusting said nut.

12. In combination with a wire line clamp including clamping members and arms projecting from the same, a substantially U shaped clevis rockably mounted at its bight portion on one of said arms and straddling V the same, said clevis being provided at its bight portion with an outwardly projecting angularly disposed handle, a bracketse'cured on the other arm,.a nut slidable in the bracket for adjustment toward and away from said other arm, said nut projecting above and below the bracket and being provided in its forward face with transversely extending grooves adapted for reception of the end portions of the arms of the clevis, the clevis being provided at the outerend of each of its arms with an enlarged knob and an inwardly beveled element connecting the knob and the arm and the nut being provided at the outer end of each of said grooves with V a seat for reception of said beveled element,

and a. T screw threaded through said nut and having the inner end of its shankbearing against the arm on which the bracket is mounted, said T screw being secured against outward .movement through the bracket. j

In testimony whereof I aflix my signature.

CHRIST F. norrs. 

